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Diffstat (limited to 'thirdparty/libvpx/vp9/decoder/vp9_detokenize.c')
-rw-r--r--thirdparty/libvpx/vp9/decoder/vp9_detokenize.c224
1 files changed, 224 insertions, 0 deletions
diff --git a/thirdparty/libvpx/vp9/decoder/vp9_detokenize.c b/thirdparty/libvpx/vp9/decoder/vp9_detokenize.c
new file mode 100644
index 0000000000..47dc107fe2
--- /dev/null
+++ b/thirdparty/libvpx/vp9/decoder/vp9_detokenize.c
@@ -0,0 +1,224 @@
+/*
+ * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "vpx_mem/vpx_mem.h"
+#include "vpx_ports/mem.h"
+
+#include "vp9/common/vp9_blockd.h"
+#include "vp9/common/vp9_common.h"
+#include "vp9/common/vp9_entropy.h"
+#if CONFIG_COEFFICIENT_RANGE_CHECKING
+#include "vp9/common/vp9_idct.h"
+#endif
+
+#include "vp9/decoder/vp9_detokenize.h"
+
+#define EOB_CONTEXT_NODE 0
+#define ZERO_CONTEXT_NODE 1
+#define ONE_CONTEXT_NODE 2
+
+#define INCREMENT_COUNT(token) \
+ do { \
+ if (counts) \
+ ++coef_counts[band][ctx][token]; \
+ } while (0)
+
+static INLINE int read_coeff(const vpx_prob *probs, int n, vpx_reader *r) {
+ int i, val = 0;
+ for (i = 0; i < n; ++i)
+ val = (val << 1) | vpx_read(r, probs[i]);
+ return val;
+}
+
+static int decode_coefs(const MACROBLOCKD *xd,
+ PLANE_TYPE type,
+ tran_low_t *dqcoeff, TX_SIZE tx_size, const int16_t *dq,
+ int ctx, const int16_t *scan, const int16_t *nb,
+ vpx_reader *r) {
+ FRAME_COUNTS *counts = xd->counts;
+ const int max_eob = 16 << (tx_size << 1);
+ const FRAME_CONTEXT *const fc = xd->fc;
+ const int ref = is_inter_block(xd->mi[0]);
+ int band, c = 0;
+ const vpx_prob (*coef_probs)[COEFF_CONTEXTS][UNCONSTRAINED_NODES] =
+ fc->coef_probs[tx_size][type][ref];
+ const vpx_prob *prob;
+ unsigned int (*coef_counts)[COEFF_CONTEXTS][UNCONSTRAINED_NODES + 1];
+ unsigned int (*eob_branch_count)[COEFF_CONTEXTS];
+ uint8_t token_cache[32 * 32];
+ const uint8_t *band_translate = get_band_translate(tx_size);
+ const int dq_shift = (tx_size == TX_32X32);
+ int v, token;
+ int16_t dqv = dq[0];
+ const uint8_t *const cat6_prob =
+#if CONFIG_VP9_HIGHBITDEPTH
+ (xd->bd == VPX_BITS_12) ? vp9_cat6_prob_high12 :
+ (xd->bd == VPX_BITS_10) ? vp9_cat6_prob_high12 + 2 :
+#endif // CONFIG_VP9_HIGHBITDEPTH
+ vp9_cat6_prob;
+ const int cat6_bits =
+#if CONFIG_VP9_HIGHBITDEPTH
+ (xd->bd == VPX_BITS_12) ? 18 :
+ (xd->bd == VPX_BITS_10) ? 16 :
+#endif // CONFIG_VP9_HIGHBITDEPTH
+ 14;
+
+ if (counts) {
+ coef_counts = counts->coef[tx_size][type][ref];
+ eob_branch_count = counts->eob_branch[tx_size][type][ref];
+ }
+
+ while (c < max_eob) {
+ int val = -1;
+ band = *band_translate++;
+ prob = coef_probs[band][ctx];
+ if (counts)
+ ++eob_branch_count[band][ctx];
+ if (!vpx_read(r, prob[EOB_CONTEXT_NODE])) {
+ INCREMENT_COUNT(EOB_MODEL_TOKEN);
+ break;
+ }
+
+ while (!vpx_read(r, prob[ZERO_CONTEXT_NODE])) {
+ INCREMENT_COUNT(ZERO_TOKEN);
+ dqv = dq[1];
+ token_cache[scan[c]] = 0;
+ ++c;
+ if (c >= max_eob)
+ return c; // zero tokens at the end (no eob token)
+ ctx = get_coef_context(nb, token_cache, c);
+ band = *band_translate++;
+ prob = coef_probs[band][ctx];
+ }
+
+ if (!vpx_read(r, prob[ONE_CONTEXT_NODE])) {
+ INCREMENT_COUNT(ONE_TOKEN);
+ token = ONE_TOKEN;
+ val = 1;
+ } else {
+ INCREMENT_COUNT(TWO_TOKEN);
+ token = vpx_read_tree(r, vp9_coef_con_tree,
+ vp9_pareto8_full[prob[PIVOT_NODE] - 1]);
+ switch (token) {
+ case TWO_TOKEN:
+ case THREE_TOKEN:
+ case FOUR_TOKEN:
+ val = token;
+ break;
+ case CATEGORY1_TOKEN:
+ val = CAT1_MIN_VAL + read_coeff(vp9_cat1_prob, 1, r);
+ break;
+ case CATEGORY2_TOKEN:
+ val = CAT2_MIN_VAL + read_coeff(vp9_cat2_prob, 2, r);
+ break;
+ case CATEGORY3_TOKEN:
+ val = CAT3_MIN_VAL + read_coeff(vp9_cat3_prob, 3, r);
+ break;
+ case CATEGORY4_TOKEN:
+ val = CAT4_MIN_VAL + read_coeff(vp9_cat4_prob, 4, r);
+ break;
+ case CATEGORY5_TOKEN:
+ val = CAT5_MIN_VAL + read_coeff(vp9_cat5_prob, 5, r);
+ break;
+ case CATEGORY6_TOKEN:
+ val = CAT6_MIN_VAL + read_coeff(cat6_prob, cat6_bits, r);
+ break;
+ }
+ }
+ v = (val * dqv) >> dq_shift;
+#if CONFIG_COEFFICIENT_RANGE_CHECKING
+#if CONFIG_VP9_HIGHBITDEPTH
+ dqcoeff[scan[c]] = highbd_check_range((vpx_read_bit(r) ? -v : v),
+ xd->bd);
+#else
+ dqcoeff[scan[c]] = check_range(vpx_read_bit(r) ? -v : v);
+#endif // CONFIG_VP9_HIGHBITDEPTH
+#else
+ dqcoeff[scan[c]] = vpx_read_bit(r) ? -v : v;
+#endif // CONFIG_COEFFICIENT_RANGE_CHECKING
+ token_cache[scan[c]] = vp9_pt_energy_class[token];
+ ++c;
+ ctx = get_coef_context(nb, token_cache, c);
+ dqv = dq[1];
+ }
+
+ return c;
+}
+
+static void get_ctx_shift(MACROBLOCKD *xd, int *ctx_shift_a, int *ctx_shift_l,
+ int x, int y, unsigned int tx_size_in_blocks) {
+ if (xd->max_blocks_wide) {
+ if (tx_size_in_blocks + x > xd->max_blocks_wide)
+ *ctx_shift_a = (tx_size_in_blocks - (xd->max_blocks_wide - x)) * 8;
+ }
+ if (xd->max_blocks_high) {
+ if (tx_size_in_blocks + y > xd->max_blocks_high)
+ *ctx_shift_l = (tx_size_in_blocks - (xd->max_blocks_high - y)) * 8;
+ }
+}
+
+int vp9_decode_block_tokens(MACROBLOCKD *xd, int plane, const scan_order *sc,
+ int x, int y, TX_SIZE tx_size, vpx_reader *r,
+ int seg_id) {
+ struct macroblockd_plane *const pd = &xd->plane[plane];
+ const int16_t *const dequant = pd->seg_dequant[seg_id];
+ int eob;
+ ENTROPY_CONTEXT *a = pd->above_context + x;
+ ENTROPY_CONTEXT *l = pd->left_context + y;
+ int ctx;
+ int ctx_shift_a = 0;
+ int ctx_shift_l = 0;
+
+ switch (tx_size) {
+ case TX_4X4:
+ ctx = a[0] != 0;
+ ctx += l[0] != 0;
+ eob = decode_coefs(xd, get_plane_type(plane), pd->dqcoeff, tx_size,
+ dequant, ctx, sc->scan, sc->neighbors, r);
+ a[0] = l[0] = (eob > 0);
+ break;
+ case TX_8X8:
+ get_ctx_shift(xd, &ctx_shift_a, &ctx_shift_l, x, y, 1 << TX_8X8);
+ ctx = !!*(const uint16_t *)a;
+ ctx += !!*(const uint16_t *)l;
+ eob = decode_coefs(xd, get_plane_type(plane), pd->dqcoeff, tx_size,
+ dequant, ctx, sc->scan, sc->neighbors, r);
+ *(uint16_t *)a = ((eob > 0) * 0x0101) >> ctx_shift_a;
+ *(uint16_t *)l = ((eob > 0) * 0x0101) >> ctx_shift_l;
+ break;
+ case TX_16X16:
+ get_ctx_shift(xd, &ctx_shift_a, &ctx_shift_l, x, y, 1 << TX_16X16);
+ ctx = !!*(const uint32_t *)a;
+ ctx += !!*(const uint32_t *)l;
+ eob = decode_coefs(xd, get_plane_type(plane), pd->dqcoeff, tx_size,
+ dequant, ctx, sc->scan, sc->neighbors, r);
+ *(uint32_t *)a = ((eob > 0) * 0x01010101) >> ctx_shift_a;
+ *(uint32_t *)l = ((eob > 0) * 0x01010101) >> ctx_shift_l;
+ break;
+ case TX_32X32:
+ get_ctx_shift(xd, &ctx_shift_a, &ctx_shift_l, x, y, 1 << TX_32X32);
+ // NOTE: casting to uint64_t here is safe because the default memory
+ // alignment is at least 8 bytes and the TX_32X32 is aligned on 8 byte
+ // boundaries.
+ ctx = !!*(const uint64_t *)a;
+ ctx += !!*(const uint64_t *)l;
+ eob = decode_coefs(xd, get_plane_type(plane), pd->dqcoeff, tx_size,
+ dequant, ctx, sc->scan, sc->neighbors, r);
+ *(uint64_t *)a = ((eob > 0) * 0x0101010101010101ULL) >> ctx_shift_a;
+ *(uint64_t *)l = ((eob > 0) * 0x0101010101010101ULL) >> ctx_shift_l;
+ break;
+ default:
+ assert(0 && "Invalid transform size.");
+ eob = 0;
+ break;
+ }
+
+ return eob;
+}
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